CN101009178A

CN101009178A - Trip braking device of breaker

Info

Publication number: CN101009178A
Application number: CN 200610038003
Authority: CN
Inventors: 冯晓林; 陈晓菊; 孙永雷
Original assignee: Daqo Group Co Ltd
Current assignee: Jiangsu Daquan Kaifan Switch Co ltd
Priority date: 2006-01-25
Filing date: 2006-01-25
Publication date: 2007-08-01
Anticipated expiration: 2026-01-25
Also published as: CN100505133C

Abstract

The invention belongs to low voltage electric equipment, it relates to breaker releasing activating device which is used to trip device when contactor is excluded by short current in low voltage breaker. The device includes a casing constructed by upper cover and lower cover, a activating rotating arm is mounted between the upper cover and lower cover by rotating axes, the activating end of the activating rotating arm is throw out of the casing, elastic component which limits the rotation is set between the activating rotating arm and base of casing; two air flow channels are set in base which is corresponding with the upper cover and lower cover, the air intakes of the two air flow channels are separately opened on the upper cover and lower cover; piston which can slide along air flow channel is set in fore opening of the two air flow channels, the two pistons and activating rotating arm are a integral. The invention is simple, the production and installation is convenient, and the process of action is quick and reliable.

Description

Trip braking device of breaker

Technical field

The invention belongs to low voltage electrical equipment, relate to a kind of trip braking device of breaker that makes its action when short circuit current in low-voltage circuit breaker, occurring and causing contact to be scolded out in order to trigger mechanism.

Background technology

In the low-voltage circuit breaker course of work, when the electric current that fault such as short circuit occurs, cause flowing through contact surpassed predetermined threshold value, dynamic and static contact was scolded out under the electrodynamic repulsion force effect.The effect of trip braking device of breaker is exactly a timely trigger mechanism in this process, with the action of threading off.The existing circuit breaker trip braking device exists complex structure mostly, has changed the pressure distribution of inside modules, reliable in action is poor, reaction speed waits defective slowly.

Summary of the invention

Technical problem to be solved by this invention provides a kind of simple in structure, reliable in action, willing trip braking device of breaker.

Trip braking device of breaker of the present invention includes a housing that is involuted by loam cake and lower cover, there is an actuating pivoted arm to be installed between loam cake and the lower cover by rotating shaft, correspondingly be provided with between loam cake and the lower cover for activate the space that pivoted arm is installed and rotated in the certain angle scope, the actuation ends that activates pivoted arm is stretched out the mechanism that housing is used for connecting routine, is provided with the flexible member that limits its rotation between the matrix of actuating pivoted arm and housing; In the relative matrix of housing upper and lower cover, have two gas channels, the air inlet of two gas channels open respectively loam cake and under cover, be used for respectively communicating with the arc extinguishing zone of circuit breaker two neighboring pole; Article two, the front opening place of gas channel all is mounted with the piston that can slide along gas channel, and two pistons are as a whole and can be with activating the pivoted arm rotation with above-mentioned actuating pivoted arm.

The present invention is simple in structure, manufacturing and easy for installation, and the hyperbar that produces under the situation when it can utilize faults such as circuit breaker inside is short-circuited directly promotes to activate the pivoted arm action as power, and course of action rapidly, reliably.

Description of drawings

Fig. 1 is the decomposition texture schematic diagram of first embodiment of the invention;

Fig. 2 is the planar structure schematic diagram first embodiment removes loam cake when not moving after;

Fig. 3 is the planar structure schematic diagram first embodiment removes loam cake when carrying out actuation motion after;

Fig. 4 is the decomposition texture schematic diagram of second embodiment of the invention;

Fig. 5 is the planar structure schematic diagram second embodiment removes loam cake when not moving after;

Fig. 6 is the planar structure schematic diagram second embodiment removes loam cake when carrying out actuation motion after.

Embodiment

As shown in the figure, housing 1 of the present invention is involuted by loam cake 11 and lower cover 12, and activating pivoted arm 2 can rotate between loam cake and lower cover, and the actuation ends 21 that activates pivoted arm is stretched out outside the housing, is used for connecting conventional mechanism.Activate pivoted arm and comprise that also 22, two pistons of two pistons that are connected as a single entity with it are placed in opening 132 places of two gas channels 13 in the housing respectively and can slide along gas channel, the area that piston is stressed is corresponding with the radius that activates the pivoted arm rotation with it.Two gas channels 13 are not connected, their air inlet 131 be placed in respectively loam cake and under cover, when housing was installed between two consecutive roots of circuit breaker, the air inlet 131 of two gas channels can communicate with the arc extinguishing zone of two neighboring pole respectively like this.

Activating to be provided with between pivoted arm and the housing is used for making piston to press to the flexible member 3 that gas channel is pressed into.In the embodiment of Fig. 1～shown in Figure 3, flexible member 3 is a compression spring; In the embodiment of Fig. 4～shown in Figure 6, flexible member 3 is a torsion spring, and the main body of torsion spring is enclosed within on the fixed axis on the housing, and the elastic arm of torsion spring is pressed in and activates the pivoted arm back side.In addition, flexible member also can adopt other forms such as reed.

The present invention is installed between two consecutive roots of circuit breaker in use, when faults such as any utmost point of circuit breaker is short-circuited, the circuit breaker air pressure inside raises, gas enters a gas channel by the air inlet on the housing, just promoting piston when pressure surpasses preset value outwards moves, activate the pivoted arm action thereby drive, driving mechanism makes its dropout.

Claims

1, a kind of trip braking device of breaker, it is characterized in that: it includes a housing (1) that is involuted by loam cake (11) and lower cover (12), there is an actuating pivoted arm (2) to be installed between loam cake and the lower cover by rotating shaft, the actuation ends (21) that activates pivoted arm is stretched out housing, is provided with the flexible member (3) that limits its rotation between the matrix of actuating pivoted arm and housing; Have two gas channels (13) in the relative matrix of housing upper and lower cover, the air inlet of two gas channels (131) is opened respectively on loam cake (11) and lower cover (12); Article two, the front opening (132) of gas channel (13) locates all to be mounted with the piston (22) that can slide along gas channel, and two pistons are with to activate pivoted arm as a whole.

2, trip braking device of breaker according to claim 1 is characterized in that: described flexible member (3) is a compression spring.

3, trip braking device of breaker according to claim 1 is characterized in that: described flexible member (3) is a torsion spring, and the main body of torsion spring is enclosed within on the fixed axis on the housing, and the elastic arm of torsion spring is pressed in and activates the pivoted arm back side.